\documentclass[a4paper,oneside,20pt]{book} 

\usepackage[applemac]{inputenc} %use latin1 for windows and linux
\usepackage[T1]{fontenc} 
\usepackage{txfonts}
\usepackage{enumerate}
\usepackage{graphicx}
\usepackage{color}
\definecolor{MyBrown}{rgb}{0.694,0.078,0.078}
\usepackage{url}
\usepackage[pdfborder=0 0 0,colorlinks=true,linkcolor= MyBrown,plainpages=false,pdfpagelabels]{hyperref}
\usepackage[english,francais]{babel} 
\usepackage{makeidx}
%\usepackage{index}
\makeindex
\usepackage[inner=3.83cm]{geometry}
\headsep = 25pt

%%% BG
\usepackage{eso-pic}

\input{style.tex}


\author{\Huge <author>} 
\title{
\brownit{\gargantuan {\upshape \textbf{<title>}}} \\
\emph {<subtitle>}
} 
\date{} %oter la date

  
\pagestyle{empty}

\begin{document}
 
\frontmatter
\begin{figure}[h] 
\centering 
\maketitle 
\includegraphics{cover.jpg} 
\vspace{2cm}
\end{figure}

\tableofcontents
\label{toc}
\pagestyle{fancy} 

\newpage

\mainmatter 

\input{bookcontent.tex}

\backmatter
\chapter*{nota bene}
Here you can put some paragraphs as a backmatter for your book.
\printindex
\label{ind}
\end{document}
